Zyan Drench is a simple yet very entertaining game developed using the Zyan Communication Framework. The Game board is a random picture of size 15x15. Start from the top-left corner of the board. Select a new color for the top-left pixel, and all adjacent pixels of the same color will be painted over with the new color. The goal is to drench the whole board with your own color. Zyan Drench has several modes: play against Android phone (with adjustable skill level), play solo (classic single-player mode), and network game. It is completely ad-free and open source.
dsi is a simple game of invading aliens. You must stop those aliens from landing on you. It features smooth scrolling, high scores, 5 levels, simple controls, sound effects, and user selectable music. Working joystick support. Watch out for the tenacious mega! The graphics can be customized out of the box without requiring any recompiling. A simple definition file can be customized for coders.
garith is a game similar in spirit to BSD's "arithmetic" or TuxMath. The game asks you to perform a simple arithmetic operation within a certain time frame. It improves your skills by stressing the operations you get more frequently wrong or that longer to answer. The statistics are saved/restored across games, so that each game is tuned for your current arithmetic abilities.